I also have a 2016 35C. We love it. Was worried about the tail, but went up a windy pass in southern Cal. with trucks going by and no strong push. It handles great.
So we had a problem with the A/C / FAN and Heater controls just stopped working. Called Thor and they got me working in 10 minutes, turned out to be a fuse in the fuse box. Not blown, just loose. pushed it in and everything worked.
Try
1877-855-2867 / warrantysupport@tmcrv.com They were really good with me. I also asked about putting a water filter on the ICE maker and they sent me a full water schematic for the coach.
At this point, I am impressed with Thor.